CN109974506A - A kind of removal component and tube bundle assembly take Guan Huanguan method - Google Patents
A kind of removal component and tube bundle assembly take Guan Huanguan method Download PDFInfo
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- CN109974506A CN109974506A CN201910185566.9A CN201910185566A CN109974506A CN 109974506 A CN109974506 A CN 109974506A CN 201910185566 A CN201910185566 A CN 201910185566A CN 109974506 A CN109974506 A CN 109974506A
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- heat exchanger
- tube
- exchanger tube
- mandril
- tubesheet holes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
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Abstract
The invention discloses a kind of removal components and tube bundle assembly to take Guan Huanguan method, removing component includes mandril, tube sheet and heat exchanger tube, heat exchanger tube protrudes into the tubesheet holes on tube sheet, one end of heat exchanger tube is located at the groove of tubesheet holes, the other end of heat exchanger tube is located at outside tubesheet holes, mandril includes top and bottom, and the bottom surface of upper end and the bottom surface of lower end connect, and the lower end of mandril is extend into heat exchanger tube.Method includes the following steps: the heat exchanger tube that cutting is connect with tube sheet；Remove the weld seam in exchanger tubes and tubesheets hole；It obtains removing component, takes out heat exchanger tube；The standby pipe more renewed.Removal modular construction of the invention is simple, it is easy to operate, it is versatile, Guan Huanguan method is taken to can effectively solve the problem that the technical problem for taking Guan Huanguan in manufacture of heat exchangers improves production efficiency to tubesheet holes without obvious damage using the tube bundle assembly for removing component, and it is simple and convenient for operation, and tool construction used by this method is simple, and it is reusable, it is low in cost.
Description
Technical field
The present invention relates to heat exchanger fields, and in particular to a kind of removal component and tube bundle assembly take Guan Huanguan method.
Background technique
Heat exchanger is the equipment that the portion of energy of hot fluid is passed to cold fluid, is widely used in chemical industry, petroleum, moves
In power, food and other industrial productions.During heat-exchanger products manufacture and use, the manufacture of the tube bundle assembly of heat exchanger is not
It will appear some quality problems, such as heat exchanger tube plugging phenomenon avoidablely, therefore, it is stifled that some designs reserved in product design
Pipe allowance, ordinary circumstance plugging quantity is no more than 1% and sum is no more than 2, and needs to obtain the approval of the side of buying.
But the manufacturing quality of heat exchanger-type product is influenced by factors, in practice it is possible that plugging number
The case where amount is more than design plugging allowance, at this time, it may be necessary to the heat exchanger tube for being unsatisfactory for requiring in tube bundle assembly is replaced, with
Solve above-mentioned manufacture problem.In addition, being directed to the heat exchanger such as U-shaped that number of heat exchange tubes is more, tube sheet is thicker and restrains complex distribution
The not disclosed report of heat exchanger takes Guan Huanguan method.
Therefore, it is necessary to study one kind tube bundle assembly easy to operate, reusable, at low cost to take Guan Huanguan method, with
Solving Tube Sheet of Heat Exchanger tread assembly takes pipe to change pipe manufacture problem.
Summary of the invention
In order to overcome the above problem, present inventor has performed sharp study, a kind of removal component and tube bundle assembly are designed
Guan Huanguan method is taken, which includes mandril, tube sheet and heat exchanger tube, and heat exchanger tube protrudes into the tubesheet holes on tube sheet, heat exchange
Pipe for through cutting and skiving after heat exchanger tube, reduce the expanded joint stress between exchanger tubes and tubesheets, mandril include upper end and
The bottom surface of lower end, the bottom surface of upper end and lower end connects, and mandril lower end is extend into heat exchanger tube, using above-mentioned removal component into
Row tube bundle assembly takes Guan Huanguan, obtains again ejecting heat exchanger tube from tubesheet holes using mandril after removing component, then more renew
Heat exchanger tube, removal component of the invention and Guan Huanguan method is taken to can effectively solve the problem that tube bundle assembly takes in manufacture of heat exchangers
The technical problem of Guan Huanguan, and this method is simple and convenient for operation can be improved production efficiency and low in cost, to complete this
Invention.
The purpose of the present invention on the one hand be to provide a kind of removal component, the removal component includes mandril, tube sheet and changes
Heat pipe, the heat exchanger tube protrude into the tubesheet holes on tube sheet,
One end of the heat exchanger tube is located at the groove of tubesheet holes, and the other end of heat exchanger tube is located at outside tubesheet holes,
Wherein, the mandril includes top and bottom, and the bottom surface of upper end and the bottom surface of lower end connect, the mandril
Lower end is extend into heat exchanger tube.
Wherein, the heat exchanger tube be through cutting and skiving after heat exchanger tube, the end face of the section of heat exchanger tube and tube sheet it
Between distance be 100~250mm, preferably 100~200mm.
Wherein, the bottom surface of the mandril upper end is contacted with the section of heat exchanger tube, and the cross-sectional area of mandril upper end is greater than pipe
The center line of the cross-sectional area of plate hole, mandril upper end is overlapped with the center line of mandril lower end.
Wherein, length of the length of the mandril lower end not less than the heat exchanger tube after cutting.
The purpose of the present invention further aspect is that providing a kind of tube bundle assembly takes Guan Huanguan method, this method includes following
Step:
The heat exchanger tube that step 1, cutting are connect with tube sheet；
Step 2, the weld metal for removing exchanger tubes and tubesheets hole；
Step 3 obtains removing component, takes out heat exchanger tube；
Step 4, the standby pipe more renewed.
Wherein, in step 1, the section of the heat exchanger tube after cutting and the end face of tube sheet are parallel, the section and tube sheet of heat exchanger tube
The distance between end face be 100~250mm, preferably 100~200mm, more preferably 100~150mm.
Wherein, in step 2, using the weld seam gold between burr or retaining wall on slope equipment removal heat exchanger tube and tubesheet holes groove
Belong to.
Wherein, in step 2, tubesheet holes at least one end is equipped with groove, and the angle of groove is 20~60 °, preferably 25~
50°。
Wherein, step 3 includes following sub-step:
The tube wall of step 3.1, skiving heat exchanger tube；
Step 3.2 obtains removing component, and heat exchanger tube is ejected from tubesheet holes；
Step 3.3, processing tubesheet holes.
Wherein, in step 3.1, use machine plus drilling heat transfer tube wall with skiving pipe wall of heat exchange pipe.
Wherein, in step 3.2, heat exchanger tube is ejected from tubesheet holes using mandril, the mandril includes top and bottom,
The bottom surface of upper end and the bottom surface of lower end connect.
Wherein, in step 3.2, mandril lower end is cylindrical structure, and mandril lower end can extend into heat exchanger tube；Mandril upper end
It cannot protrude into heat exchanger tube, the height of mandril lower end is greater than the distance between heat exchanger tube section and tube sheet end face.
Wherein, in step 3.2, mandril lower end is protruded into heat exchanger tube, and mandril upper end bottom surface is contacted with heat exchanger tube section, to top
Bar upper end applies the power parallel with tube sheet axially bored line, and heat exchanger tube is ejected.
Wherein, in step 4, new standby pipe and tube sheet is assembled, preferably assembled by way of expanded and welded tube joint.
The advantageous effect of present invention is that:
(1) tube bundle assembly provided by the present invention takes Guan Huanguan method to can effectively solve the problem that in manufacture of heat exchangers and exchanges heat
Pipe takes the technical problem of Guan Huanguan, thicker especially suitable for tube sheet, number of heat exchange tubes is more, heat exchanger tube Pipe bundle structure is complicated changes
Hot device (such as U-tube heat exchanger) takes Guan Huanguan；
(2) method of the invention is using the weld seam gold between burr or retaining wall on slope equipment removal exchanger tubes and tubesheets hole
Belong to, so that tubesheet holes is restored to the original state, eliminate the welded connecting between exchanger tubes and tubesheets, conducive to the taking-up of heat exchanger tube；
(3) method provided by the present invention carries out skiving by the inner wall of exchange heat pipe, eliminates exchanger tubes and tubesheets hole
Between expanded joint stress, smoothly taken out from tube sheet to be conducive to heat exchanger tube, reduce damage to tubesheet holes inner wall；
(4) method of the invention is ejected heat exchanger tube using mandril from tubesheet holes, simple and convenient for operation, and mandril energy
Enough so that heat exchanger tube is not damaged to the inner wall of tubesheet holes during being ejected, to extend the service life of tube sheet；
(5) of the invention to take Guan Huanguan method can be realized to take Guan Huanguan to U-tube heat exchanger, solve current U-shaped
The problem of heat exchange tube can not be replaced realizes the reuse of the parts such as tube sheet, effectively solves tube sheet buying, processing cost, contracting
Short procurement cycle.
Detailed description of the invention
Fig. 1 shows the schematic diagram of heat exchange tube tread assembly and tube sheet after a kind of cutting of preferred embodiment of the present invention；
Fig. 2 shows the schematic diagrames of the heat exchanger tube after a kind of tube sheet of preferred embodiment of the present invention and cutting；
Fig. 3 shows the exchanger tubes and tubesheets of a kind of preferred embodiment of the present invention removed between heat exchanger tube and tube sheet after weld seam
Schematic diagram；
Fig. 4 shows the schematic diagram of the heat exchanger tube after a kind of tube sheet of preferred embodiment of the present invention and skiving tube wall；
Fig. 5 shows a kind of schematic diagram of the mandril of preferred embodiment and heat exchanger tube and tube sheet of the present invention；
Fig. 6 shows the tube sheet of a kind of preferred embodiment of the present invention taken out after heat exchanger tube and the schematic diagram of tubesheet holes；
Fig. 7 shows a kind of structural schematic diagram of the tubesheet holes of preferred embodiment of the present invention；
Fig. 8 shows the schematic diagram of a kind of tube sheet of U-tube heat exchanger of the present invention and heat exchanger tube tube bank.
Drawing reference numeral explanation:
1- tube sheet；
2- heat exchanger tube；
3- mandril；
4- tubesheet holes；
5- weld metal.
Specific embodiment
Below by attached drawing and preferred embodiment, the present invention is described in more detail.Illustrated by these, the present invention
The characteristics of and advantage will become more apparent from it is clear.
One aspect of the present invention provides a kind of removal component, as shown in figure 5, the removal component includes mandril 3, tube sheet 1 and changes
Heat pipe 2.
According to the present invention, the heat exchanger tube 2 for removing component is preferably the heat exchanger tube in U-tube heat exchanger tube.
According to the present invention, thickness >=200mm of tube sheet 1, preferably >=250mm, more preferably >=300mm, such as the thickness of tube sheet 1
Degree is 350mm.
According to the present invention, heat exchanger tube 2 protrudes into the tubesheet holes 4 on tube sheet 1, and preferably heat exchanger tube 2 is matched with 4 interference of tubesheet holes
It closes, heat exchanger tube and tube sheet will not relatively move under no external force, i.e., in the case where not exerting a force, heat exchanger tube 2 cannot
It falls off from tubesheet holes 4.Therefore, to take out the heat exchanger tube 2 in tubesheet holes 4 can exchange the application of heat pipe 2 along 4 axis direction of tubesheet holes
Power.
According to the present invention, after heat exchanger tube 2 protrudes into tubesheet holes 4, one end of heat exchanger tube 2 is located at the groove of tubesheet holes 4, changes
The other end of heat pipe 2 is located at outside tubesheet holes 4.
According to the present invention, heat exchanger tube 2 is the heat exchanger tube after cutting and skiving, is obtained preferably by following steps
Heat exchanger tube:
The heat exchanger tube 2 that step 1), cutting are connect with tube sheet 1；
Step 2), the weld metal 5 for removing heat exchanger tube 2 and tubesheet holes 4,
The tube wall of step 3), skiving heat exchanger tube 2.
According to the present invention, in step 1), cutting the heat exchanger tube 2 connecting with tube sheet 1 is that will not meet to want using cutting tool
The tube bundle assembly for the heat exchanger tube 2 asked is cut off, and preferably all cuts the tube bank on tube sheet 1, disconnected on heat exchanger tube 2 after cutting
Face is as close as possible to 1 end face of tube sheet, in order to replace, as shown in Figure 1.
According to the present invention, in step 1), the distance between the section of the heat exchanger tube 2 after cutting and 1 end face of tube sheet exchange heat
2 cut end of pipe stretch out 1 end face of tube sheet length be 100~250mm, preferably 100~200mm, more preferably 100~150mm,
Such as 100mm.The length that 1 section of tube sheet is stretched out at the section end of heat exchanger tube 2 is too long, is easy to make heat exchanger tube 2 in pipe when taking pipe
It is shaken in plate, tubesheet holes 4 is caused to damage, the too short operation for being not easy to take using mandril 3 pipe of length.
In the present invention, after tube bank cutting, heat exchanger tube 2 includes the part in tube sheet and the part on the outside of tube sheet.
According to the present invention, the specification of heat exchanger tube 2 is not particularly limited, and preferably the diameter of heat exchanger tube 2 is 12~60mm.
According to the present invention, in step 1), the cutting tool used preferably cuts for cutting tool commonly used in the art
Machine, more preferably planetary cutting machine, hydraulic cutter, external clamping type cutting machine, numerical control hydraulic cutting machine, electric slicer, gas
One or more of dynamic cutting machine etc..
According to the present invention, in step 1), the section of the heat exchanger tube 2 after cutting is parallel with the end face of tube sheet 1, i.e. heat exchanger tube 2
Section it is vertical with the axis of tubesheet holes 4, so that mandril 3 being capable of heat exchanging when subsequent exchange heat pipe 2 is taken out or dismantles
Pipe 2 apply with the consistent power of axis direction in 4 hole of tube sheet, enable heat exchanger tube 2 smoothly along 4 axis direction of tubesheet holes from tube sheet
It is ejected in hole 4, causes to damage without the inner wall to tubesheet holes 4, be easily installed new standby pipe.
It is the combination side by welding and expanded joint in the present invention, between the tube bundle assembly, that is, heat exchanger tube 2 and tube sheet 1 of heat exchanger
What formula was assembled, tubesheet holes 4 is equipped with groove, is used to carry out the weld seam between heat exchanger tube 2 and tubesheet holes 4 by the groove
Welding, it is preferable that heat exchanger tube 2 is extend into tubesheet holes 4, is welded the weld seam between heat exchanger tube 2 and tubesheet holes 4, is then changed
The expanded joint of heat pipe 2 and tube sheet 1, wherein the mode of expanded joint is not specially limited, and completes the assembly of tube bundle assembly and tube sheet 1.Therefore,
It needs that cutting will be restrained, after cutting off heat exchanger tube 2, needs to exchange the weld seam between heat pipe 2 and tube sheet 1 and handled.
According to the present invention, at least one end of tubesheet holes 4 is equipped with groove, and the angle of groove is 20~55 °, preferably 25~
50 °, more preferably 30~45 °, as shown in Figure 2.
It is preferably carried out mode according to the present invention, the both ends of tubesheet holes 4 all have groove, wherein far from section one end
The groove of tubesheet holes 4, bevel angle are denoted as β, which is the main welding position for welding heat exchanger tube 2 and tubesheet holes 4, such as β
It is 45 °, β groove depth of chamfering n is 1~3mm, preferably 2mm；The bevel angle of 4 other end of tubesheet holes is denoted as α, such as α is
30 °, α groove depth of chamfering m is 1mm, as shown in Figure 3 and 7.
According to the present invention, in step 2), (weld metal is generally the weld metal 5 between removal heat exchanger tube 2 and tube sheet 1
Stainless steel corrosion resistant material), weld metal 5 plays the role of that heat exchanger tube 2 and tube sheet 1 is welded and fixed, and preferably passes through burr or groove
Process equipment (such as groove chamfer machining machine) removes the weld metal 5 between heat exchanger tube 2 and tube sheet 1, restores tubesheet holes 4
Groove is prepared for subsequent disassembly or taking-up heat exchanger tube 2.
In the present invention, due between heat exchanger tube 2 and tube sheet 1 being assembled by expanded joint, heat exchanger tube 2 is interior when expanded joint
Diameter becomes larger, and can smoothly to take out heat exchanger tube 2, heat exchanger tube 2 is taken out from tubesheet holes 4, and do not damage the inner wall of tubesheet holes 4, can
It is realized by eliminating the expanded joint stress between heat exchanger tube 2 and tube sheet 1.
According to the present invention, in step 3), the tube wall of skiving heat exchanger tube 2, after 2 tube wall of heat exchanger tube is thinning, heat exchanger tube 2 and tube sheet
Expanded joint stress between hole 4 reduces, so that heat exchanger tube 2 can more smoothly take out from tube sheet 1.If skiving front tube plate hole
The internal diameter of heat exchanger tube 2 in 4 is D1, the internal diameter of 2 corresponding position of heat exchanger tube is D in skiving back tube sheet hole 42, then D1< D2, such as Fig. 3
With shown in Fig. 4.
According to the present invention, in step 3), using 2 inner wall of machine plus drilling heat exchanger tube, so that the thickness of 2 tube wall of heat exchanger tube subtracts
It is small, to release the expanded joint stress between heat exchanger tube 2 and tube sheet 1, make the expanded joint stress relaxation between heat exchanger tube 2 and tube sheet 1,
Be conducive to take out heat exchanger tube 2 from tubesheet holes 4.
According to the present invention, the part for exchanging 2 skiving of heat pipe includes and the heat exchanger tube 2 in the tubesheet holes 4 of the progress expanded joint of tube sheet 1
Length.
In the present invention, after protruding into the tube wall skiving of the heat exchanger tube in tubesheet holes 42, the expanded joint of tubesheet holes 4 and heat exchanger tube 2
Stress elimination is ejected convenient for heat exchanger tube 2, if but the heat exchanger tube 2 in the outside of tubesheet holes 4 tube wall without skiving, be easy pushing up
When out, so that generating stress between heat exchanger tube 2 and tubesheet holes 4, frictional force between the two is caused to increase, to 4 inner wall of tubesheet holes
It causes to damage.
A kind of preferred embodiment according to the present invention in step 3), when the tube wall for exchanging heat pipe 2 carries out skiving, is cut
The length of thin heat exchanger tube 2 is the length for the heat exchanger tube 2 connecting after being cut off with tube sheet 1, so that exchanging heat in subsequent taking-up
It is more smooth when pipe 2.
According to the present invention, step 3), the 20 of the thickness with a thickness of the tube wall before skiving of the tube wall of the heat exchanger tube 2 after skiving
~45%, preferably 25~40%.
According to the present invention, before skiving the tube wall of heat exchanger tube 2 with a thickness of 2mm, the thickness of the tube wall of the heat exchanger tube 2 after skiving
For 0.5~0.8mm.
According to the present invention, mandril 3 includes top and bottom, and preferably top and bottom form T-type structure, wherein on mandril 3
End is horizontal component, and 3 lower end of mandril is vertical component.The bottom surface of upper end and the bottom surface of lower end connect.It stretches the lower end of mandril 3
Enter into heat exchanger tube 2.
According to the present invention, mandril 3 is made of metal material, is preferably made of Q345 or 35CrMo material, guarantees ejecting
Obvious deformation does not occur when heat exchanger tube 2.
According to the present invention, 3 lower end of mandril can extend into heat exchanger tube 2, and the upper end of mandril 3 cannot be protruded into heat exchanger tube 2.
According to the present invention, 3 upper end of mandril is column structure, and mandril lower end is cylindrical structure, and preferably 3 upper end of mandril is under
End is in T-shape structure.
According to the present invention, in step 3), 3 upper end of mandril is column structure, and the preferably bottom surface of column structure is round, just more
One or more of side shape, more preferable bottom surface are one or more of round, square or regular hexagon.
According to the present invention, the cross-sectional area of 3 upper end of mandril be greater than tubesheet holes 4 cross-sectional area, wherein cross section with
The axis of tubesheet holes 4 is vertical.
A kind of preferred embodiment according to the present invention, 3 upper end of mandril are cylindrical structure, and the bottom surface of 3 upper end of mandril is straight
Diameter is greater than the internal diameter of tubesheet holes 4.
According to the present invention, the outer diameter of the bottom surface of 3 lower end of mandril is less than the internal diameter of 4 outside heat exchanger tube 2 of tubesheet holes, tubesheet holes 4
The difference of the outer diameter of the bottom surface of 3 lower end of internal diameter and mandril of outside heat exchanger tube 2 is 0.05~0.5mm, preferably 0.1~0.2mm.
According to the present invention, the length of 3 lower end of mandril is greater than the distance between section and 1 end face of tube sheet of heat exchanger tube 2, that is, pushes up
The length of 3 lower end of bar be greater than 1 outside heat exchanger tube 2 of tube sheet length, preferably the length of 3 lower end of mandril be greater than tube sheet 1 thickness, more
It is preferred that the difference of the thickness of the length and tube sheet 1 of 3 lower end of mandril is not less than 100mm, preferably 100mm~200mm, more preferably
100~250mm.
If the heat exchanger tube in 2 section end of heat exchanger tube, that is, tube sheet, 1 outside carries out skiving, the outer diameter of 3 lower end bottom surface of mandril is less than
The internal diameter of heat exchanger tube 2 after skiving.If the heat exchanger tube in 1 outside of tube sheet does not carry out skiving, the outer diameter of the bottom surface of 3 lower end of mandril is needed
Less than the internal diameter of the heat exchanger tube of non-skiving.
The basal diameter of further preferred embodiment according to the present invention, 3 upper end of mandril is less than 1 upper tube plate hole 4 of tube sheet
Between center away from, in order to mandril 3 ejection when heat exchanger tube 2 convenient for operation, not will receive neighbouring heat exchanger tube space resistance
Hinder.
According to the present invention, the axis of 3 upper end of mandril is overlapped with the axis of 3 lower end of mandril, it is preferable that the axis of mandril 3 with
The axis of tubesheet holes and the axis of heat exchanger tube are overlapped.
According to the present invention, the bigger intensity of height of height >=30mm of 3 upper end of mandril, 3 upper end of mandril are better, it is easier to push up
Heat exchanger tube 2 out.
According to the present invention, the lower end of mandril 3 is extend into the heat exchanger tube 2 of skiving inner wall, the bottom surface of 3 upper end of mandril and heat exchange
The section of pipe 2 is in contact, preferably the axis perpendicular of the bottom surface of 3 upper end of mandril and heat exchanger tube 2.
According to the present invention, the heat exchanger tube with a thickness of before skiving exchange heat tube thickness 20%~45%, preferably 25%
~40%.For example, before skiving the tube wall of heat exchanger tube 2 with a thickness of 2mm, the tube wall of the heat exchanger tube 2 after skiving with a thickness of 0.5~
0.8mm。
The present invention provides a kind of tube bundle assemblies to take Guan Huanguan method, method includes the following steps:
The heat exchanger tube 2 that step 1, cutting are connect with tube sheet 1；
Step 2, the weld metal 5 for removing heat exchanger tube 2 and tubesheet holes 4；
Step 3 obtains removing component, takes out heat exchanger tube 2；
Step 4, the standby pipe more renewed.
Tube Sheet of Heat Exchanger tread assembly of the invention takes Guan Huanguan method, this method especially suitable for the quantity of heat exchanger tube it is more or
Density larger (such as tube sheet diameter >=500, tube sheet hole count >=100), tube sheet be thicker, heat exchanger tube Pipe bundle structure complexity heat exchanger
Take Guan Huanguan.
In the present invention, when something goes wrong, since number of heat exchange tubes is more, and U-shaped structure causes the heat exchanger tube of U-tube heat exchanger
Heat exchanger tube is not easy to disassemble, causes U-shaped heat exchanger tube that can not replace, and loses if product is directly scrapped greatly, right in process of production
Production cycle is affected.Tube bundle assembly of the invention takes Guan Huanguan method to be suitable for, and heat exchanger tube Pipe bundle structure is complicated, restrains and divides
The close U-tube heat exchanger of cloth takes Guan Huanguan, can be realized the reuse of the parts such as tube sheet, can effectively solve tube sheet and adopt
Purchase, processing cost, shorten procurement cycle, and the schematic diagram that tube sheet and the U-shaped heat exchanger tube of U-tube heat exchanger are restrained is as shown in Figure 8.
According to the present invention, the tube bundle assembly is that the heat exchanger tube of U-tube heat exchanger is restrained.
According to the present invention, tube plate thickness >=200mm, preferably >=250mm, more preferably >=300mm, such as tube plate thickness are
350mm。
According to the present invention, in step 1, cutting the heat exchanger tube 2 connecting with tube sheet 1 is to utilize cutting tool will be undesirable
The tube bundle assembly of heat exchanger tube 2 cut off, preferably the tube bank on tube sheet 1 is all cut, the section after cutting on heat exchanger tube 2
As close as possible to 1 end face of tube sheet, in order to replace, as shown in Figure 1.
According to the present invention, in step 1, the distance between the section of the heat exchanger tube 2 after cutting and 1 end face of tube sheet are heat exchanger tube
The length that 2 cut end stretch out 1 end face of tube sheet is 100~250mm, preferably 100~200mm, more preferably 100~150mm, example
Such as 100mm.The length that 2 cut end of heat exchanger tube stretches out 1 section of tube sheet is too long, is easy to make heat exchanger tube 2 in tube sheet when taking pipe
It shakes, tubesheet holes 4 is caused to damage, the too short operation for being not easy to take using mandril 3 pipe of length.
In the present invention, after tube bank cutting, heat exchanger tube 2 includes the part in tube sheet and the part on the outside of tube sheet.
According to the present invention, the specification of heat exchanger tube 2 is not particularly limited, and preferably the diameter of heat exchanger tube 2 is 12~60mm.
According to the present invention, in step 1, the cutting tool used for cutting tool commonly used in the art, preferably cutting machine,
More preferably planetary cutting machine, external clamping type cutting machine, numerical control hydraulic cutting machine, electric slicer, is pneumatically cut hydraulic cutter
One or more of cutting mill etc..
According to the present invention, in step 1, the section of the heat exchanger tube 2 after cutting is parallel with the end face of tube sheet 1, i.e. heat exchanger tube 2
Section is vertical with the axis of tubesheet holes 4, so that mandril 3 can exchange heat pipe when subsequent exchange heat pipe 2 is taken out or dismantles
2 apply with the consistent power of axis direction in 4 hole of tube sheet, enable heat exchanger tube 2 smoothly along 4 axis direction of tubesheet holes from tubesheet holes
It is ejected in 4, causes to damage without the inner wall to tubesheet holes 4, be easily installed new standby pipe.
It is the combination side by welding and expanded joint in the present invention, between the tube bundle assembly, that is, heat exchanger tube 2 and tube sheet 1 of heat exchanger
What formula was assembled, tubesheet holes 4 is equipped with groove, is used to carry out the weld seam between heat exchanger tube 2 and tubesheet holes 4 by the groove
Welding, it is preferable that heat exchanger tube 2 is extend into tubesheet holes 4, is welded the weld seam between heat exchanger tube 2 and tubesheet holes 4, is then changed
The expanded joint of heat pipe 2 and tube sheet 1, wherein the mode of expanded joint is not specially limited, and completes the assembly of tube bundle assembly and tube sheet 1.Therefore,
It needs that cutting will be restrained, after cutting off heat exchanger tube 2, needs to exchange the weld seam between heat pipe 2 and tube sheet 1 and handled.
According to the present invention, the angle of 4 groove of tubesheet holes is 20~55 °, preferably 25~50 °, more preferably 30~45 °,
As shown in Figure 2.
It is preferably carried out mode according to the present invention, the both ends of tubesheet holes 4 all have groove, wherein far from section one end
The groove of tubesheet holes 4, bevel angle are denoted as β, which is the main welding position for welding heat exchanger tube 2 and tubesheet holes 4, such as β
It is 45 °, β groove depth of chamfering n is 1~3mm, preferably 2mm；The bevel angle of 4 other end of tubesheet holes is denoted as α, such as α is
30 °, α groove depth of chamfering m is 1mm, as shown in Figure 3 and 7.
According to the present invention, in step 2, (weld metal is generally not for the weld metal 5 between removal heat exchanger tube 2 and tube sheet 1
Become rusty steel corrosion resistant material), weld metal 5 plays the role of that heat exchanger tube 2 and tube sheet 1 is welded and fixed, and is preferably added by burr or groove
Construction equipment (such as groove chamfer machining machine) removes the weld metal 5 between heat exchanger tube 2 and tube sheet 1, and tubesheet holes 4 is made to restore slope
Mouthful, it prepares for subsequent disassembly or taking-up heat exchanger tube 2.
According to the present invention, in step 3, take out heat exchanger tube 2 the following steps are included:
The tube wall of step 3.1, skiving heat exchanger tube 2；
Step 3.2 obtains removing component, and heat exchanger tube 2 is ejected from tubesheet holes 4；
Step 3.3, processing tubesheet holes 4.
In the present invention, due between heat exchanger tube 2 and tube sheet 1 being assembled by expanded joint, heat exchanger tube 2 is interior when expanded joint
Diameter becomes larger, and can smoothly to take out heat exchanger tube 2, heat exchanger tube 2 is taken out from tubesheet holes 4, and do not damage the inner wall of tubesheet holes 4, can
It is realized by eliminating the expanded joint stress between heat exchanger tube 2 and tube sheet 1.
According to the present invention, in step 3.1, the tube wall of skiving heat exchanger tube 2, after 2 tube wall of heat exchanger tube is thinning, heat exchanger tube 2 and pipe
Expanded joint stress between plate hole 4 reduces, so that heat exchanger tube 2 can more smoothly take out from tube sheet 1.If skiving front tube sheet
The internal diameter of heat exchanger tube 2 in hole 4 is D1, the internal diameter of 2 corresponding position of heat exchanger tube is D in skiving back tube sheet hole 42, then D1< D2, such as
Shown in Fig. 3 and Fig. 4.
According to the present invention, in step 3.1, using 2 inner wall of machine plus drilling heat exchanger tube, so that the thickness of 2 tube wall of heat exchanger tube subtracts
It is small, to release the expanded joint stress between heat exchanger tube 2 and tube sheet 1, make the expanded joint stress relaxation between heat exchanger tube 2 and tube sheet 1,
Be conducive to take out heat exchanger tube 2 from tubesheet holes 4.
According to the present invention, the part for exchanging 2 skiving of heat pipe includes and the heat exchanger tube 2 in the tubesheet holes 4 of the progress expanded joint of tube sheet 1
Length.
In the present invention, after protruding into the tube wall skiving of the heat exchanger tube in tubesheet holes 42, the expanded joint of tubesheet holes 4 and heat exchanger tube 2
Stress elimination is ejected convenient for heat exchanger tube 2, if but the heat exchanger tube 2 in the outside of tubesheet holes 4 tube wall without skiving, be easy pushing up
When out, so that generating stress between heat exchanger tube 2 and tubesheet holes 4, frictional force between the two is caused to increase, to 4 inner wall of tubesheet holes
It causes to damage.
A kind of preferred embodiment according to the present invention in step 3.1, when the tube wall for exchanging heat pipe 2 carries out skiving, is cut
The length of thin heat exchanger tube 2 is the length for the heat exchanger tube 2 connecting after being cut off with tube sheet 1, so that exchanging heat in subsequent taking-up
It is more smooth when pipe 2.
According to the present invention, in step 3.1, the thickness with a thickness of the tube wall before skiving of the tube wall of the heat exchanger tube 2 after skiving
20~45%, preferably 25~40%.
According to the present invention, in step 1, before skiving the tube wall of heat exchanger tube 2 with a thickness of 2mm, the pipe of the heat exchanger tube 2 after skiving
Wall with a thickness of 0.5~0.8mm.Heat exchanger tube 2 after wall thickness skiving to the thickness has certain rigidity, while also achieving swollen
Scoop out the release of power.
According to the present invention, in step 3.2, after the wall thickness of skiving heat exchanger tube 2, heat exchanger tube 2 is ejected from tube sheet 1, preferably
Heat exchanger tube 2 is ejected using mandril 3, as shown in Figure 5.
According to the present invention, in step 3.2, mandril 3 divides for top and bottom, and preferably top and bottom form T-type structure,
In, 3 upper end of mandril is horizontal component, and 3 lower end of mandril is vertical component.The bottom surface of upper end and the bottom surface of lower end connect.
According to the present invention, mandril 3 is made of Q345 or 35CrMo material, guarantees not occurring when ejecting heat exchanger tube 2 obvious
Deformation.
According to the present invention, in step 3.2, the lower end of mandril 3 be can extend into heat exchanger tube 2, and the upper end of mandril 3 cannot be protruded into
In heat exchanger tube 2.
According to the present invention, in step 3.2, the lower end of mandril 3 extend into heat exchanger tube 2 by the nozzle at the section end of heat exchanger tube 2
In, i.e. the lower end of mandril 3 is extend into the heat exchanger tube 2 of 1 exterior portion of tube sheet.
According to the present invention, in step 3.2,3 lower end of mandril is cylindrical structure, then the outer diameter of the bottom surface of 3 lower end of mandril is small
In the internal diameter of 1 outside heat exchanger tube 2 of tube sheet, if the difference of the outer diameter of the bottom surface of the internal diameter of 1 outside heat exchanger tube 2 of tube sheet and 3 lower end of mandril
Value is X, 0.05mm≤X≤0.50mm, preferably 0.10mm≤X≤0.20mm；If 2 section end of heat exchanger tube, that is, tube sheet, 1 outside
Heat exchanger tube carries out skiving, then the outer diameter of 3 lower end bottom surface of mandril is less than the internal diameter of the heat exchanger tube 2 after skiving.If 1 outside of tube sheet is changed
Heat pipe does not carry out skiving, then the outer diameter of the bottom surface of 3 lower end of mandril need to be less than the internal diameter of the heat exchanger tube of non-skiving.
According to the present invention, in step 3.2, the length of 3 lower end of mandril is greater than between 1 end face of 2 section of heat exchanger tube and tube sheet
Distance, the i.e. length of 3 lower end of mandril are greater than the length of 1 outside heat exchanger tube 2 of tube sheet, and the preferably length of 3 lower end of mandril is greater than tube sheet 1
Thickness, if the length of 3 lower end of mandril be L, tube sheet 1 with a thickness of H, the difference L-H >=100mm of the two, preferably 100mm≤L-
H≤200mm。
According to the present invention, in step 3.2,3 upper end of mandril is column structure, and preferably the bottom surface of column structure is circle, just
One or more of polygon, more preferable bottom surface are one or more of round, square or regular hexagon.
A kind of preferred embodiment according to the present invention, 3 upper end of mandril are cylindrical structure, and the bottom surface of 3 upper end of mandril is straight
Diameter is greater than the internal diameter of tubesheet holes 4.
The basal diameter of further preferred embodiment according to the present invention, 3 upper end of mandril is less than 1 upper tube plate hole 4 of tube sheet
Between center away from, in order to mandril 3 ejection when heat exchanger tube 2 convenient for operation, not will receive neighbouring heat exchanger tube space resistance
Hinder.
According to the present invention, the axis of 3 upper end of mandril is overlapped with the axis of 3 lower end of mandril.
According to the present invention, in step 3.2, the bottom surface of 3 upper end of mandril and the bottom surface of 3 lower end of mandril are connected.
According to the present invention, in step 3.2, height >=30mm of 3 upper end of mandril, the bigger intensity of height of 3 upper end of mandril is more
It is good, it is easier to eject heat exchanger tube 2.
According to the present invention, in step 3.2, the lower end of mandril 3 is extend into the heat exchanger tube 2 of skiving inner wall, and 3 upper end of mandril is leaned on
The bottom surface of nearly lower end is in contact with the section of heat exchanger tube 2, preferably the axis perpendicular of the bottom surface of 3 upper end of mandril and heat exchanger tube 2.
According to the present invention, in step 3.2,3 lower end of mandril is extend into heat exchanger tube 2, the bottom surface of 3 upper end of mandril and heat exchange
The section of pipe 2 contacts fitting, obtains removing component, i.e., structure as shown in Figure 5 passes through the upper end to the mandril 3 for removing component
Force, enables to heat exchanger tube 2 to be ejected from tube sheet 1.
According to the present invention, in step 3.2, apply the power of the bottom surface perpendicular to 3 upper end of mandril, the side of power to 3 upper end of mandril
To the direction for being directed toward 3 lower end of mandril by 3 upper end of mandril, so that power of the section end of heat exchanger tube 2 by the upper end of mandril 3
Effect, effect of the heat exchanger tube 2 by the power in the direction for being directed toward tube sheet 1 by section end, so that heat exchanger tube 2 is ejected from tube sheet 1.
According to the present invention, ejection process wants the ascending heat exchanger tube 2 that is gradually increased to move the force of mandril 3,
Then stop increasing when heat exchanger tube 2 occurs mobile, use the smallest ejecting force as far as possible, guarantees the safety roof from tube sheet 1 of heat exchanger tube 2
Out, the damage of firmly excessive exchange heat pipe 2 and tube sheet 1 is avoided.
In the present invention, by 3 upper end of mandril force so that 2 stress of heat exchanger tube, since 2 tube wall of heat exchanger tube is cut
It is thin, so that the stress between heat exchanger tube 2 and tubesheet holes 4 reduces, so that heat exchanger tube 2 is easier to be ejected by mandril 3.
In the present invention, 3 lower end of mandril is extend into heat exchanger tube 2, and 3 upper end of mandril is contacted with 2 section nozzle of heat exchanger tube, mandril
3 stress, heat exchanger tube 2 are ejected, since the length of 3 lower end of mandril is greater than the thickness of tube sheet 1, then in the process of ejection heat exchanger tube 2
In, heat exchanger tube 2 is located between 3 lower end of tube sheet 1 and mandril, to will not shake when guaranteeing that heat exchanger tube 2 moves in tube sheet 1
It is dynamic, it avoids heat exchanger tube 2 and tubesheet holes 4 is caused to scratch, and since the tube wall of heat exchanger tube 2 is by skiving, moved in tubesheet holes 4
When, 3 lower end of mandril can enhance the rigidity of heat exchanger tube 2, and exchange heat pipe 2 is played a supporting role, and guarantee the axis of heat exchanger tube 2 when movement
Line keeps being overlapped with the holding of the axis of tubesheet holes 4, to smoothly eject from tubesheet holes 4, will change after ejection in 1 other end of tube sheet
Heat pipe takes out.
In the present invention, take out that heat exchanger tube 2 is easy to operate and convenient power-saving by the way of the ejection of mandril 3, also, using top
Mode out not will cause heat exchanger tube 2 and big deformation occur, and will not cause to damage to the inner wall of tubesheet holes 4.
According to the present invention, it in step 3.3, after heat exchanger tube 2 is ejected, needs to handle tubesheet holes 4, preferably to tube sheet
Hole 4 cleared up, rubbing down, and recovery tubesheet holes 4 is original state, i.e., with the pattern before heat exchanger tube assembly, as shown in fig. 6, to benefit
In the new heat exchanger tube of assembly.
According to the present invention, in step 4, new standby pipe and tube sheet are assembled, comprising the following steps:
New standby pipe is extend into tubesheet holes 4 by step 4.1；
Step 4.2 carries out expanded and welded tube joint to new standby pipe and tube sheet 1.
According to the present invention, in step 4.1, prepare new standby pipe, new standby pipe meets the new of the specification requirement of heat exchanger
Spare heat exchanger tube, new standby pipe is extend into tubesheet holes 4.
According to the present invention, in step 4.2, expanded and welded tube joint is carried out to new standby pipe and tube sheet 1, what expanded and welded tube joint, that is, expanded joint and welding were combined
Mode.
A kind of preferred embodiment according to the present invention in step 4.2, carries out after first welding new standby pipe and tube sheet 1
The mode of expanded joint is assembled.
Further preferred embodiment according to the present invention in step 4.2, welds the weldering between new standby pipe and tube sheet 1
Then seam carries out expanded joint, the side of expanded joint to new standby pipe and tube sheet 1 with the bonding strength reinforced between new standby pipe and tube sheet 1
Formula is not particularly limited, and can be mechanical expanding or flexible expanded joint.
Another preferred embodiment according to the present invention in step 4.2, carries out first expanded joint to new standby pipe and tube sheet 1
The mode welded afterwards is assembled.
Further preferred embodiment according to the present invention in step 4.2, new standby pipe is carried out with tube sheet 1 first swollen
It connects, the mode of expanded joint is not particularly limited, and then will be fixed between new standby pipe and tube sheet 1 by welding again, and welding is new
Standby pipe outer wall and tube sheet 1 groove, welded seam realizes the assembly between new standby pipe and tube sheet 1.
According to the present invention, in step 4, after assembling new standby pipe, complete tube bundle assembly takes Guan Huanguan.
Tube bundle assembly of the invention takes Guan Huanguan method suitable for number of heat exchange tubes is more, tube sheet is thicker, tube bundle assembly point
The manufacture of the heat exchanger-type product of cloth complexity, method of the invention is easy to operate, use scope is wide, no Special use environment, work
Condition requirement, process is flexible, such as push rod structure of tool used in the method for the present invention is simple, it is easy to use, reusable and
Manufacturing cost is low, can effectively solve the problem that Tube Sheet of Heat Exchanger tread assembly takes pipe to change pipe manufacture problem.
Embodiment
By taking certain U-tube heat exchanger as an example, the tube bundle assembly on tube sheet is carried out to take Guan Huanguan, the tube plate thickness of the heat exchanger
For 350mm, tube sheet bore dia is 19.25mm, and tube sheet hole count is 3058.
Using burr machine-cut pitch cutting, the heat exchanger tube tube bank on tube sheet is cut, after cutting the section of heat exchanger tube with change
The axis of heat pipe is vertical, and parallel with the section of tube sheet, and the distance between section and tube sheet end face of the close section are 50；
The internal diameter of heat exchanger tube is 17.5mm in tube sheet, and the internal diameter of heat exchanger tube is 15mm on the outside of tube sheet；
Weld metal between heat exchanger tube and tubesheet holes is removed using burr, restores the original state of tubesheet holes, close to heat exchanger tube
The groove α of the tubesheet holes of section is 30 °, and groove chamfering m is 1mm, and the groove β of the tubesheet holes other end is 45 °, and groove depth n is
2mm；
Drilling, the tube wall of skiving heat exchanger tube are carried out using inner wall of the drilling machine to the heat exchanger tube on tube sheet, former pipe thickness is
2mm, the pipe thickness of heat exchanger tube is 0.5mm after skiving, reduces the expanded joint stress between exchanger tubes and tubesheets hole；
Heat exchanger tube is ejected using mandril, mandril lower end is cylindrical structure, and the length of mandril lower end is 550mm, and bottom surface is straight
Diameter is 14.6mm, and mandril upper end is cylindrical structure, and mandril upper end length is 30mm, and mandril lower end is extend into heat exchanger tube,
So that the bottom surface of mandril upper end is in contact with the section of heat exchanger tube, the power perpendicular to heat exchanger tube axis is applied to mandril, so that heat exchange
Pipe is smoothly ejected from tubesheet holes, thus takes out heat exchanger tube；
Cleaning, rubbing down tubesheet holes restore tubesheet holes；
New standby pipe, that is, new exchanger tubes and tubesheets are assembled, heat exchanger tube is extend into tubesheet holes, tube sheet is passed through
α and β groove exchange heat pipe on hole and the weld seam between tubesheet holes are welded；
Then it exchanges heat pipe and tube sheet carries out strength and buckling, complete the assembly of heat exchanger tube and tube sheet, complete changing for heat exchanger
Pipe.
It takes Guan Huanguan method can be realized using this and Guan Huanguan is taken to U-tube heat exchanger, be able to solve current U-shaped heat exchange
The problem of pipe can not be replaced if product determines that loss from spoilage is very big, and is affected to the production cycle.Of the invention takes Guan Huanguan
Method can be realized the reuse of the other parts such as tube sheet, can the buying of effectively save tube sheet, processing cost, shorten buying week
Phase, cost-saved 400,000 yuan/platform, and take pipe back tube sheet hole without obvious scratch, without scratch, it can be achieved that the reuse of tube sheet.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", "front", "rear"
Orientation or positional relationship be that the description present invention is merely for convenience of based on the orientation or positional relationship under working condition of the present invention
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore be not considered as limiting the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " phase
Even " " connection " should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or the connection of one is general
It is logical；It can be mechanical connection, be also possible to be electrically connected；It can be and be directly connected to, can also be indirectly connected with by intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Preferred embodiment and exemplary example is combined to describe the invention in detail above.But need to state
It is that these specific embodiments are only not constitute any limit to protection scope of the present invention to illustrative explanations of the invention
System.Without departing from spirit of that invention and protection scope, the technology of the present invention content and embodiments thereof can be carried out
Various improvement, equivalencing or modification, these fall within the protection scope of the present invention.Protection scope of the present invention is with appended power
Subject to benefit requires.
Claims (10)
1. a kind of removal component, which is characterized in that the removal component includes mandril, tube sheet and heat exchanger tube, and the heat exchanger tube is stretched
Enter in the tubesheet holes on tube sheet,
One end of the heat exchanger tube is located at the groove of tubesheet holes, and the other end of heat exchanger tube is located at outside tubesheet holes,
The mandril includes top and bottom, and the bottom surface of upper end and the bottom surface of lower end connect, and the lower end of the mandril is protruded into
Into heat exchanger tube.
2. removal component according to claim 1, which is characterized in that the heat exchanger tube is by cutting off and changing after skiving
Heat pipe, the distance between the section of heat exchanger tube and the end face of tube sheet are 100~250mm, preferably 100~200mm.
3. removal component according to claim 1, which is characterized in that the bottom surface of the mandril upper end and the section of heat exchanger tube
Contact, the cross-sectional area of mandril upper end are greater than the cross-sectional area of tubesheet holes, center line and the mandril lower end of mandril upper end
Center line is overlapped.
4. removal component according to claim 1, which is characterized in that after the length of the mandril lower end is not less than cutting
The length of heat exchanger tube.
5. a kind of tube bundle assembly takes Guan Huanguan method, which is characterized in that the described method comprises the following steps:
The heat exchanger tube that step 1, cutting are connect with tube sheet；
Step 2, the weld metal for removing exchanger tubes and tubesheets hole；
Step 3 obtains removing component, takes out heat exchanger tube；
Step 4, the standby pipe more renewed.
6. the method according to claim 1, wherein being changed in step 2 using burr or the removal of retaining wall on slope equipment
Weld metal between heat pipe and tubesheet holes groove restores the groove of tubesheet holes.
7. the method according to claim 1, wherein tubesheet holes at least one end is equipped with groove, groove in step 2
Angle be 20~55 °, preferably 25~50 °.
8. the method according to claim 1, wherein step 3 includes following sub-step:
The tube wall of step 3.1, skiving heat exchanger tube；
Step 3.2 obtains removing component, and heat exchanger tube is ejected from tubesheet holes；
Step 3.3, processing tubesheet holes.
9. according to the method described in claim 8, it is characterized in that, using machine plus drilling heat transfer tube wall to cut in step 3.1
Thin pipe wall of heat exchange pipe.
10. according to the method described in claim 8, it is characterized in that, mandril lower end being protruded into heat exchanger tube, is made in step 3.2
Mandril upper end bottom surface is contacted with heat exchanger tube section, is obtained removing component, is applied the power parallel with tube sheet axially bored line to mandril upper end,
Heat exchanger tube is ejected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910185566.9A CN109974506A (en) | 2019-03-12 | 2019-03-12 | A kind of removal component and tube bundle assembly take Guan Huanguan method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910185566.9A CN109974506A (en) | 2019-03-12 | 2019-03-12 | A kind of removal component and tube bundle assembly take Guan Huanguan method |
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| CN109974506A true CN109974506A (en) | 2019-07-05 |
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ID=67078652
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910185566.9A Pending CN109974506A (en) | 2019-03-12 | 2019-03-12 | A kind of removal component and tube bundle assembly take Guan Huanguan method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405432A (en) * | 2019-07-30 | 2019-11-05 | 保定新胜冷却设备有限公司 | Transformer is water-cooled the process of device cooling tube replacement |
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| CN109396770A (en) * | 2018-12-20 | 2019-03-01 | 东方电气集团东方锅炉股份有限公司 | A kind of replacing options and special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube |
| CN109396851A (en) * | 2018-12-21 | 2019-03-01 | 核动力运行研究所 | A kind of micro- damage of shell-and-tube heat exchanger heat-transfer pipe takes pipe device and technique |
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| EP0228025A3 (en) * | 1985-12-18 | 1989-03-22 | Montedipe S.P.A. | Method for the non-destructive removal of tubes from heat exchangers and tool useful to that purpose |
| CN101209521A (en) * | 2006-12-26 | 2008-07-02 | 河南农业大学 | Tube changing technique of heat interchange steel tube for evaporator |
| CN103170817A (en) * | 2011-12-26 | 2013-06-26 | 核动力运行研究所 | Drilling type plugged pipe taking device |
| CN108907607A (en) * | 2018-06-01 | 2018-11-30 | 河南省中原大化集团有限责任公司 | A kind of triamine device replacement bobbin carriage method |
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